package com.atguigu.gulimall.product.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.utils.R;
import com.atguigu.gulimall.product.entity.SkuImagesEntity;
import com.atguigu.gulimall.product.entity.SpuInfoDescEntity;
import com.atguigu.gulimall.product.feign.SeckillFeignService;
import com.atguigu.gulimall.product.service.*;
import com.atguigu.gulimall.product.to.SeckillSkuRedisTo;
import com.atguigu.gulimall.product.vo.SkuItemSaleAttrVo;
import com.atguigu.gulimall.product.vo.SkuItemVo;
import com.atguigu.gulimall.product.vo.SpuItemGroupAttrVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.atomic.AtomicReference;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.SkuInfoDao;
import com.atguigu.gulimall.product.entity.SkuInfoEntity;
import org.springframework.util.StringUtils;


@Service("skuInfoService")
public class SkuInfoServiceImpl extends ServiceImpl<SkuInfoDao, SkuInfoEntity> implements SkuInfoService {

    @Autowired
    private SkuImagesService imagesService;

    @Autowired
    private SpuInfoDescService descService;

    @Autowired
    private AttrGroupService groupService;

    @Autowired
    private SkuSaleAttrValueService saleAttrValueService;

    @Autowired
    private ThreadPoolExecutor executor;

    @Autowired
    private SeckillFeignService seckillFeignService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<SkuInfoEntity> page = this.page(
                new Query<SkuInfoEntity>().getPage(params),
                new QueryWrapper<SkuInfoEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public void saveSkuInfo(SkuInfoEntity skuInfoEntity) {
        this.baseMapper.insert(skuInfoEntity);
    }

    @Override
    public PageUtils queryPageByCondition(Map<String, Object> params) {
        QueryWrapper<SkuInfoEntity> queryWrapper = new QueryWrapper<>();
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            queryWrapper.and(wrapper -> {
                wrapper.eq("sku_id", key).or().like("sku_name", key);
            });
        }
        String catelogId = (String) params.get("catelogId");
        if (!StringUtils.isEmpty(catelogId) && "0".equals(catelogId)) {
            queryWrapper.eq("catelog_id", catelogId);
        }
        String brandId = (String) params.get("brandId");
        if (!StringUtils.isEmpty(brandId) && "0".equals(brandId)) {
            queryWrapper.eq("brand_id", brandId);
        }
        String min = (String) params.get("min");
        if (!StringUtils.isEmpty(min)) {
            queryWrapper.ge("min", min);
        }
        String max = (String) params.get("max");
        if (!StringUtils.isEmpty(max)) {
            try {
                BigDecimal bigDecimal = new BigDecimal(max);
                if (bigDecimal.compareTo(new BigDecimal("0")) == 1) {
                    queryWrapper.le("max", max);
                }
            } catch (Exception e) {
                log.error("输入的最大价格出现错误");
            }
        }
        IPage<SkuInfoEntity> page = this.page(
                new Query<SkuInfoEntity>().getPage(params),
                queryWrapper
        );

        return new PageUtils(page);
    }

    @Override
    public List<SkuInfoEntity> getSkuBySkuId(Long spuId) {

        List<SkuInfoEntity> list = this.list(new QueryWrapper<SkuInfoEntity>().eq("spu_id", spuId));
        return list;
    }

    @Override
    public SkuItemVo item(Long skuId) throws ExecutionException, InterruptedException {
        SkuItemVo skuItemVo = new SkuItemVo();

        /**
         * 异步执行并获取返回值
         **/
        AtomicReference<Long> catalogId = null;
        AtomicReference<Long> spuId = null;
        CompletableFuture<SkuInfoEntity> infoFucture = CompletableFuture.supplyAsync(() -> {
            //1:sku基本信息 pms_sku_info
            SkuInfoEntity skuInfoEntity = getById(skuId);
            skuItemVo.setInfo(skuInfoEntity);
            catalogId.set(skuInfoEntity.getCatalogId());
            spuId.set(skuInfoEntity.getSpuId());
            return skuInfoEntity;
        }, executor);

        CompletableFuture<Void> sale = infoFucture.thenAcceptAsync(result -> {
            //3:获取sku的销售属性组合
            List<SkuItemSaleAttrVo> saleAttrVos = saleAttrValueService.getSalesBySkuId(result.getSpuId());
            skuItemVo.setSaleAttr(saleAttrVos);
        }, executor);

        CompletableFuture<Void> desc = infoFucture.thenAcceptAsync(result -> {
            //4:获取spu的介绍
            SpuInfoDescEntity spuInfoDescEntity = descService.getById(spuId);
            skuItemVo.setDesc(spuInfoDescEntity);
        }, executor);

        CompletableFuture<Void> group = infoFucture.thenAcceptAsync(result -> {
            //5:获取spu的规格参数信息
            List<SpuItemGroupAttrVo> groupAttrs = groupService.getAttrGroupWithAttrsBySpuId(spuId.get(), catalogId.get());
            skuItemVo.setGroupAttrs(groupAttrs);
        }, executor);

        CompletableFuture<Void> image = CompletableFuture.runAsync(() -> {
            //2:sku的图片信息 pms_sku_images
            List<SkuImagesEntity> images = imagesService.getImagesBySkuId(skuId);
            skuItemVo.setImages(images);
        }, executor);

        CompletableFuture<Void> future = CompletableFuture.runAsync(() -> {
            //3:查询当前sku是否参与秒杀
            R r = seckillFeignService.getSkuSeckillInfo(skuId);
            if (r.getCode() == 200) {
                SeckillSkuRedisTo redisTo = r.getDate(new TypeReference<SeckillSkuRedisTo>() {
                });
                skuItemVo.setSeckillSkuRedisTo(redisTo);
            }
        }, executor);

        CompletableFuture.allOf(sale,desc,group,image,future).get();
        return skuItemVo;
    }

    @Override
    public R selectById(String skuId) {
        SkuInfoEntity skuInfoEntity = this.baseMapper.queryById(skuId);
        QueryWrapper<Object> wrapper = new QueryWrapper<>();
        wrapper.eq("skuId", skuId);
        return R.ok();
    }


    /**
     *
     **/
    @Override
    public SkuInfoEntity selectList() {
        Integer i = 1;
        SkuInfoEntity skuInfoEntity = baseMapper.selectListById(i);
        return null;
    }

}